The Incidence of Breast Cancer in the World

Breast cancer is the most widespread type of cancer identified in women, apart from skin cancer. Nearly one third (32%) of every cancers identified in women are breast cancer.

A number of factors may have an effect on breast cancer incidence and play a part to variations in rates over time and amongst populations. One such factor is hormone replacement therapy (HRT). Data collected, partly, through the National Institute of Health's Women's Health Initiative advocated an enlarged risk for invasive breast cancer amongst women who used HRT.

In accordance with the Surveillance, Epidemiology, and End Results (SEER) Program of the National Cancer Institute that:
 White, Hawaiian, and African-American women contain the highest incidence of invasive breast cancer in the United States (just about four times higher than the lowest group).
 Korean, American Indian, and Vietnamese women cover the lowest incidence of invasive breast cancer in the United States.
 African-American has the uppermost death rate from breast cancer and is more probable to be made a diagnosis with a later stage of breast cancer than White women.
 In the age groups, 30-54 and 55-69 years, African-American women contain the uppermost death rate from breast cancer, followed by Hawaiian women, and white non-Hispanic women. On the other hand, in the 70 year old age group, the death rate from breast cancer for white women is upper than for African –American.

Though really few cases of breast cancer take place in women in their teens or early 20s, breast cancer is the most generally identified cancer in women under 35. By age 35-39 almost 1,500 women are diagnosed annually. Breast cancer incidence rates maintain to rise with age, with the greatest rate of raise before the menopause.

However, the incidence of breast cancer differs by race and ethnicity. The incidence of breast cancer has been growing for several years in economically developed countries. The incidence of postmenopausal breast cancer is linked with screening and hormone therapy. The mechanisms that affect the incidence of breast cancer in premenopausal women are less well comprehended.